#include <Adafruit_NeoPixel.h>//
#define PIN 26
#define LEDS  16

Adafruit_NeoPixel strip(LEDS, PIN, NEO_GRB + NEO_KHZ800);

int PIRstate = LOW;

void setup() {
  pinMode(14, INPUT);
  strip.begin();
  strip.show(); // All pixels OFF
}

void loop() 
{
  PIRstate = digitalRead(14);
  if (PIRstate == HIGH) 
  {
   //Simulate motion
    colorWipe(strip.Color(255, 215, 0), 100); //Yellow
    colorWipe(strip.Color(255, 0, 127), 100); //Pink
    colorWipe(strip.Color(0, 191, 230), 100); //Sky blue
    rainbowCycle(1000); //Rainbow effect
    //tbh used ChatGPT for RainbowCycle since it looked cool!
  }
}

//Circle colour
void colorWipe(int color, int Delay){
  for(int i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, color);
    strip.show();
    delay(Delay);
  }
}

// Cycle through the colors of the rainbow
void rainbowCycle(int Delay) { 
  for(int j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(int i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
   delay(Delay);
  }
}

// Generate a color based on a position on the color wheel (0 - 255)
int Wheel(byte WheelPos) {
  if(WheelPos < 85) {
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if(WheelPos < 170) {
   WheelPos -= 85;
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}